Proxy added successfully, but when calling it gives a 404 error

Ionic Framework ionic-v3
1

This is the ionic.config.json

{
  "name": "projectSniper",
  "integrations": {
    "cordova": {}
  },
  "type": "ionic-angular",
  "pro_id": "5d7f8490",
  "typescript": "true",
  "proxies": [{
    "path": "/apibase",
    "proxyUrl": "http://api.esmox.apprells.com/3.0/stats/custom?slice[]=year&slice[]=month&slice[]=day&filter[date_from]=2017-03-01&filter[date_to]=2018-08-01&conversionTypes[]=confirmed&conversionTypes[]=total&limit=10&api-key=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  }]
}

when compiling it shows that it has added the api;

Proxy added:/apibase =>
[app-scripts] http://api.esmox.apprells.com/3.0/stats/custom?slice[]=year&slice[]=month&slice[]=day&filter[date_from]=2017-03-01&filter[date_to]=2018-08-01&conversionTypes[]=confirmed&conversionTypes[]=total&limit=10&api-key=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

This is the api calling part: (Ionic/Typescript)

private myUrl: string = `/apibase`;

callApi() {
    this.heads.append('access-control-allow-headers','content-type,accept,access-control-allow-origin, access-control-request-method,access-control-allow-headers');
    this.heads.append('access-control-maximum-age','1000');
    this.heads.append('content-type','application/json');
    this.heads.append('accept','application/json, text/plain, */*');
    this.heads.append('Origin','*://*/*');
    this.heads.append('referer','*://*/*');
    this.heads.append('access-control-allow-origin','*');
    this.heads.append('access-control-request-method','GET, POST, OPTIONS');

    this.options = {
      url: this.myUrl,
      method: 'GET',
      headers: this.heads
    };

    

    this.http.request(this.myUrl,this.options).subscribe(data => {

      var jsonRes = JSON.stringify(data);
      console.log(jsonRes);


    });


  }

I am getting error response as {“status”:2,“error”:“Page Not Found”}", status: 404, ok: false

Can you please tell me what am I doing wrong here… Thanks a lot… :pray: